Heat oven to 325°F. Grease a 9-inch springform pan. Mix crumbs and butter; press into base. Bake 10 minutes.
Beat cream cheese and sugar until smooth. Mix in eggs one at a time on low, then mashed banana, sour cream, vanilla and lemon juice.
Pour over crust. Bake 55–65 minutes until edges are set and center jiggles slightly.
Turn oven off; leave door ajar and cool cheesecake inside 1 hour. Cool to room temperature; refrigerate at least 4 hours.
Unmold; top with caramel and fresh banana slices before serving.